@misc{indiciae1a293fb11f22,
  title = {Geology of volcanic rocks in the south half of the Ishpeming greenstone belt, Michigan},
  author = {Theodore J. Bornhorst and Rodney C. Johnson and L. M. H. Carter},
  year = {1993},
  doi = {10.3133/b1904p},
  url = {https://pubs.usgs.gov/publication/b1904P},
  note = {Source identifier: b1904P}
}